[websocket] chat allows specific treatment for some messages
[websocket] chat allows specific treatment for some messages

WSHello <name> from the client to define the identity of the client
WSWelcome <name> from the server

ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti